Should we expect any more preview releases or betas before 4.1 is released?

Totally. We're not happy enough with our performance yet though so I don't want to give out any dates. What we might do is a PR2 in a couple of weeks with all the stability improvements that have gone in over the last few weeks, plus some very targeted and hopefully high impact improvements to box and dock layouts (two of the biggest offenders even in 4.1)

Guys what are we complaining about! 3,4,5,6 weeks. What does it matter. This is a preview of the improvements to come. As developers we ought to know how long it takes to release a product that meets your requirements. Remember we where advised not to use this for production.

I think it's quite fine that the new Neptune theme does not support really old browsers. But it's only useful as long as we know that it is still being worked on of course. It would be good to know if the Neptune theme project is dead or still a go.